Merge pull request #18938 from vancem/EventSourceShutdown
authorVance Morrison <vancem@microsoft.com>
Tue, 17 Jul 2018 17:42:28 +0000 (10:42 -0700)
committerGitHub <noreply@github.com>
Tue, 17 Jul 2018 17:42:28 +0000 (10:42 -0700)
Add back in code deleted in .NET Core port.


Trivial merge